APRS: Difference between revisions
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* Byonics Tinytrak 4 | * Byonics Tinytrak 4 | ||
* Byonics MT8000 | * Byonics MT8000 | ||
* Several abandoned Android phones | |||
Other 2M HTs including two ICOM F11s which have no external power connectors (battery only) | Other 2M HTs including two ICOM F11s which have no external power connectors (battery only) | ||
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Breaking this all down I need a receiver to work as an iGate with a Pi 3, and a transmitter | Breaking this all down I need a receiver to work as an iGate with a Pi 3, and a transmitter | ||
to implement a Digipeater. | to implement a Digipeater. | ||
The cellphone APRSDroid solution appeals to me too, later maybe. https://wcares.org/special-interests-3/aprs/aprs-hardwired-cell/ | |||
Step one is the iGate as a data sink since I can already use the Kenwoods as sources. | Step one is the iGate as a data sink since I can already use the Kenwoods as sources. | ||
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Two common approaches (1) SDR (2) sound card + HT. I have a cheap USB sound card and a RTL-SDR on order now. | Two common approaches (1) SDR (2) sound card + HT. I have a cheap USB sound card and a RTL-SDR on order now. | ||
The RTL-SDR appeals to me the most. | The RTL-SDR appeals to me the most. | ||
A good article on the sound card approach is here https://wcares.org/special-interests-3/aprs/aprs-raspberry-pi-virtual-tnc/ | |||
It's out of date but still good. | |||
This is good too https://godseyonline.net/raspberry-pi-direwolf-digipeater-igate-soundcard-version/ | |||
Eventually, if I end up using one radio for receive and one for transmit, how do I isolate them? | Eventually, if I end up using one radio for receive and one for transmit, how do I isolate them? | ||
Revision as of 15:38, 4 September 2021
Lots of info
USBlink http://www.g4ilo.com/usblink.html USB sound card + VOX interface to PTT switch + HT
Some notes on available hardware
- Kenwood TH-D74A handheld with built in GPS and APRS
- Kenwood TM-D710A mobile with a UBlox GPS, installed in Alba.
- Byonics Tinytrak 4
- Byonics MT8000
- Several abandoned Android phones
Other 2M HTs including two ICOM F11s which have no external power connectors (battery only) and a Kenwood TH-F6A
Breaking this all down I need a receiver to work as an iGate with a Pi 3, and a transmitter to implement a Digipeater.
The cellphone APRSDroid solution appeals to me too, later maybe. https://wcares.org/special-interests-3/aprs/aprs-hardwired-cell/
Step one is the iGate as a data sink since I can already use the Kenwoods as sources. There is no iGate close to my house. So that is my first need.
iGate on a Pi
Two common approaches (1) SDR (2) sound card + HT. I have a cheap USB sound card and a RTL-SDR on order now. The RTL-SDR appeals to me the most.
A good article on the sound card approach is here https://wcares.org/special-interests-3/aprs/aprs-raspberry-pi-virtual-tnc/ It's out of date but still good.
This is good too https://godseyonline.net/raspberry-pi-direwolf-digipeater-igate-soundcard-version/
Eventually, if I end up using one radio for receive and one for transmit, how do I isolate them? One way is two antennas, and pull the receiver input to ground when transmitting. http://www.ok1rr.com/index.php/technical-topics/39-yet-another-front-end-saver
Direwolf - popular.
Xastir - this is a desktop app so I am not looking at it.
Argent Data Systems
Products for amateur radio including APRS applications
2m Transmitter MX146 from SRB -- This is a 500 mW transmitter, $70
OpenTracker+ is open source / open hardware and uses a Motorola MCU.
Tracker2
These are controllers, connects a data stream (eg weather or gps) to a Kantronics TNC.
They now have a Tracker2 with a 5 watt 2m radio now. T2-301 $229
Byonics
Maker of TinyTrak controllers and MicroTrak transmitters
Purchased way back in 20 Aug 2010 and tossed into a "future projects" box. I got a TinyTrak4 controller kit and a MicroTrak MT8000 8 watt transmitter.
2013-Sep-03 I am thinking of using the TinyTrak+MT8000 with a Garmin GPSmap as the NMEA data source, with the Garmin Power/NMEA cable. Then I can carry it on a bicycle.
TinyTrak4
Information from the source: http://www.byonics.com/tinytrak4/
The wiki: http://www.vk7hse.hobby-site.org/wiki/index.php/Main_Page
Setting up an iGate
Sam Buchanan's notes: http://www.vansairforce.com/community/showthread.php?t=30180
Some random links
Links from Andy Volokitin
http://www.basarc.org/articles/quickstartguidetoaprsforsearchandrescueapplication
http://info.aprs.net/index.php?title=SAR
http://wetnet.net/~we7u/search_and_rescue.html
http://www.ringolake.com/pic_proj/gps_trak/freetrak202.html FreeTrak -
APRS software
First off I am looking at Xastir.
Xastir on my Mac Book Pro
I moved everything to this page... Xastir
